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Electromagnetic Waves 8th Grade
  • 1. Global Positioning System signals can tell you
A) what television station you are tuned to
B) your exact location on Earth
C) how many satellites are in orbit
D) who is sending a message to your cellphone
  • 2. Which waves have some electrical properties and some magnetic properties?
A) transverse waves
B) longitudinal waves
C) mechanical waves
D) electromagnetic waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) magnetic field
B) electric field
C) medium
D) change in either a magnetic or an electric field
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic spectrum
B) electromagnetic field
C) electromagnetic wavelength
D) electromagnetic frequency
  • 5. Which model of light helps explain the photoelectric effect?
A) the electromagnetic model
B) the polarizing model
C) the particle model
D) the wave model
  • 6. FM signals travel as changes in
A) the amplitude of the wave
B) the speed of the wave
C) the loudness of the wave
D) the frequency of the wave
  • 7. On AM broadcasts, what remains constant?
A) the amplitude
B) the frequency
C) the music
D) the speech
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) ultraviolet waves
B) gamma rays
C) radio waves
D) infrared waves
  • 9. Light that has passed through a polarizing filter is called
A) photoelectric light
B) transverse light
C) white light
D) polarized light
  • 10. Visible light can be separated into various colors to form a(n)
A) X-ray picture
B) spectrum
C) thermogram
D) MRI
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) gamma rays
B) microwaves
C) infrared rays
D) ultraviolet rays
  • 12. The images made by an infrared camera are called
A) ultraviolet images
B) thermograms
C) magnetic resonance images
D) X-rays
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetism
B) electromagnetic spectrum
C) photoelectric effect
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) C
B) B
C) A
D) D
  • 15. What is the name of the type of wave labeled C?
A) infrared rays
B) radar
C) ultraviolet rays
D) visible light
  • 16. Which letter indicates X-rays?
A) B
B) C
C) D
D) A
  • 17. What type of wave that has the highest frequency?
A) x-rays
B) microwave
C) infrared rays
D) gamma rays
  • 18. What type of wave that has the the greatest energy?
A) x-rays
B) microwave
C) gamma rays
D) infrared rays
  • 19. What type of wave is labeled A?
A) ultraviolet
B) infrared
C) radio
D) visible light
  • 20. What is the object labeled as A?
A) ground transmitter
B) radio waves
C) ground receiver
D) communications satellite
  • 21. What is the object labeled B?
A) ground receiver
B) radio waves
C) communications satellite
D) ground transmitter
  • 22. What is the object labeled C?
A) radio waves
B) ground transmitter
C) communications satellite
D) ground receiver
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